<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>表格的练习</title>
</head>
<body>
<table border="1" width="500" align="center">
    <tr>
        <td colspan="3" height="100" align="center">网站名称</td>

    </tr>
    <tr>
        <td width="150" align="center">网站标题</td>
        <td colspan="2" align="center">搜索框</td>

    </tr>
    <tr>
        <td height="100" align="center">左</td>
        <td align="center">中</td>
        <td align="center">右</td>
    </tr>
    <tr>
        <td colspan="3" height="100" align="center">网站底部信息</td>

    </tr>
</table>
</body>
</html>
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